On June 19th, a shortwave embedded in southwesterly flow crossed over eastern Oregon and southwest Idaho. Sufficient mid-level moisture paired with the synoptic lift allowed thunderstorms to develop.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOI wrote it up.
On June 19th, a shortwave embedded in southwesterly flow crossed over eastern Oregon and southwest Idaho. Sufficient mid-level moisture paired with the synoptic lift allowed thunderstorms to develop. With a dry boundary layer being observed, wind gusts were the primary hazard.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boise, ID wrote its last area forecast discussion before the first event at Jun 19, 6:04 PM PST, 45 minutes earlier.
Area Forecast Discussion National Weather Service Boise ID 804 PM MDT Thu Jun 19 2025 .DISCUSSION...Showers and thunderstorms continue moving northeast across southeast Oregon this evening. Storms have largely stayed away from observation sites, so still concerned about the potential for gusty winds but so far have little actual data to use for analysis. Latest mesoscale guidance shows minimal strengthening from here into the overnight hours, with most cells slowly dissipating after around 10 PM MDT (9 PM PDT). Radar trends the past half hour have shown a gradual increase in coverage with little change in maximum dBz. So far the current forecast is holding up well and no changes are planned at this time. && .AVIATION...VFR. Isolated showers and thunderstorms in eastern Oregon moving NW, generally out of the area after 06z. Storms will be capable of producing outflows up to to 40 kts and localized blowing dust. Surface winds: W-NW 5-15 kt overnight, increasing to W- NW 10-20 kt with gusts to 20-30 kt after Fri/12z. Winds aloft at 10kft MSL: W-SW 10-20 kt. KBOI...VFR. Thunder chances tapering off, although outflows winds of 20-30 kt may travel to KBOI from distance storms. Surface winds: W- NW 5-10 kt overnight, increasing to 10-15 kt with gusts to 20-25 kt after Fri/16z. KMYL... Periods of MVFR-IFR. Showers and afternoon thunderstorms Friday/Saturday. Thunderstorms capable of producing localized outflows, small hail, and MVFR/IFR conditions. Periodic mountain obscuration. Surface winds: W-NW 5-10 kt Friday gusting to 15-20 kt Friday afternoon/evening. WEEKEND OUTLOOK...Valleys VFR, periods MVFR-IFR in mtns. Cold front Friday to bring showers, mtn tstorms, and W-NW surface winds 15-25 kt with 25-40 kt gusts. Saturday and Sunday, showers and afternoon mtn tstorms with MVFR-IFR in mtn rain/snow. Mountains obscured at times. Snow levels lowering to 5500-6500 ft MSL. Tstorms will be capable of small hail and localized outflow winds. Surface winds Sat/Sun generally NW 5-15 kt. Gusts 15-25 kt on Sat east of KMUO. && .PREV DISCUSSION... SHORT TERM...Tonight through Saturday night...Latest hi-res models begin isolated thunderstorms in southern Harney County late today and move them northeastward into Malheur and Baker Counties this evening, strongest in Baker County between sunset and midnight, then north of our CWA. Storms will feature mainly outflow wind gusts to 50 mph and local blowing dust. Then overnight and Friday morning, models (especially NamNest) show more showers and thunderstorms forming along a cold front that by noon Friday will extend from Salmon through Boise. From there the front and showers/storms will move east. Thunderstorms Friday should be wetter and not as windy as this evening's storms. This cold front will introduce windy and much cooler weather to our CWA that will continue through the weekend. High temps Friday will be about 20 degrees cooler than today in eastern OR, and 10 to 20 degrees cooler than today in Idaho, with south-central ID the last to cool. The supporting cold upper low along the BC coast will pass through our northern zones Saturday night, with snow showers as low as 6000 feet MSL. Snow accumulation up to 3 inches is possible in eastern Valley County Saturday night and Sunday morning. Breezy and further cooling will continue in our CWA Saturday through Sunday morning. Low temps Sunday morning will dip to the lower to mid 40s in the valleys, and upper 20s through 30s in the mountains and higher basins, exceptionally cool for the first day of summer. LONG TERM...Sunday through Thursday...The deep, cold upper low will exit into Montana Sunday night taking the coldest air and most of the showers with it. Models show another, weaker, upper trough coming in Monday night and Tuesday but keep showers north of our CWA. Another Pacific trough is forecast inland across northern Idaho Wednesday, and another one approaching our CWA Thursday, again with showers staying north of our CWA. These troughs will be warmer than this weekend's trough so temperatures will still be able to slowly rise through the week, rising to normal or slightly above by Thursday. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && www.weather.gov/Boise Interact with us via social media: www.facebook.com/NWSBoise www.x.com/NWSBoise DISCUSSION...SP AVIATION.....NF SHORT TERM...LC LONG TERM....LC
The Elko radar (KLRX), 247 km away, was scanning. The volume nearest the first event began at 02:46 UTC.
1 thunderstorm wind. Local standard time, as filed.
Mesonet station BQFO3 Basque Hills recorded a wind gust of 59MPH associated with a passing thunderstorm.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2025Every state in 2025This day in weather historyWarnings in Oregon, June 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1274980.